msm: camera: sync: Prevent OOB access of sync name

Issue:
strlcpy calls strlen on src ptr. If src is not NULL terminated then OOB
access will occur in below stack.
  strlen
  strlcpy
  cam_sync_init_row
  cam_sync_handle_create
  cam_sync_dev_ioctl

Fix:
Pad user-space supplied name with NULL.

CRs-Fixed: 3010262
Change-Id: Ib5c2fbfe395025ec05e0bb2980f86111e95ff54c
Signed-off-by: Trishansh Bhardwaj <tbhardwa@codeaurora.org>

drivers/cam_sync/cam_sync.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
  */
 
 #include <linux/init.h>
@@ -471,6 +471,7 @@ static int cam_sync_handle_create(struct cam_private_ioctl_arg *k_ioctl)
 		u64_to_user_ptr(k_ioctl->ioctl_ptr),
 		k_ioctl->size))
 		return -EFAULT;
+	sync_create.name[SYNC_DEBUG_NAME_LEN] = '\0';
 
 	result = cam_sync_create(&sync_create.sync_obj,
 		sync_create.name);